Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c1e964a46835277965ae40822fbd8b78292265a9c6ef57992527c388eb142590:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^